The impact of abiotic environmental factors on the occurrence, assemblages and diversity of freshwater zooplanktons in lake tanganyika, burundian littoral
Lambert Niyoyitungiye, Anirudha Giri, Bhanu Prakash Mishra, Devashish Kar
The present study was conducted on Burundian coast of Lake Tanganyika in 4 sampling sites to identify and to estimate the spatial abundance of zooplankton community and to analyze whether physicochemical properties of water influence significantly the occurrence of zooplankton population. During the survey, it has been realized that zooplankton organisms were very few in number and taxonomic diversity and was comprising of 3 orders: Cyclopoida, Calanoida (Copepods) and Cladocera represented by Diaphanosoma. 12species belonging to 4families have been noted from all study sites. The relative diversity index of families revealed that the family Diaptomidae was dominant with 5species (41.7%) followed by family Cyclopidae with 4species (33.3%), then family Sididae with 2species (16.7%) while the Temoridae family was last with a single species (8.3%) The results of species richness and the Cumulative abundance of the sampling sites showed that zooplankton species and density were variable among stations. 11species were identified at Rumonge site comprising 1152 individuals per liter followed by Kajaga and Mvugo sites with same specific richness of 10 species but with different cumulative abundance of 830 and 502 individuals per liter respectively and Nyamugari site was in last position with 8 species comprising 219 individuals per liter. Besides, the results of Canonical Correlation Analysis (CCorA) between the environmental parameters and zooplankton biomass have shown that the abundance and proliferation of some zooplankton species are affected by the physico-chemical parameters concentration by acting as either inhibitors or accelerators for zooplankton species growth.
Lambert Niyoyitungiye, Anirudha Giri, Bhanu Prakash Mishra, Devashish Kar. The impact of abiotic environmental factors on the occurrence, assemblages and diversity of freshwater zooplanktons in lake tanganyika, burundian littoral. International Journal of Entomology Research, Volume 5, Issue 2, 2020, Pages 74-82